1 /* 2 * Copyright (c) 2003, 2004 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_isa.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 35 #include <machine/bus.h> 36 #include <machine/bus_private.h> 37 #include <machine/resource.h> 38 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/openfirm.h> 41 #include <machine/ofw_machdep.h> 42 43 #include <isa/isavar.h> 44 45 #include <dev/uart/uart.h> 46 #include <dev/uart/uart_bus.h> 47 #include <dev/uart/uart_cpu.h> 48 49 #include <sparc64/pci/ofw_pci.h> 50 #include <sparc64/isa/ofw_isa.h> 51 52 bus_space_tag_t uart_bus_space_io; 53 bus_space_tag_t uart_bus_space_mem; 54 55 static struct bus_space_tag bst_store[3]; 56 57 static int 58 uart_cpu_channel(char *dev) 59 { 60 char alias[64]; 61 phandle_t aliases; 62 int len; 63 64 strcpy(alias, dev); 65 if ((aliases = OF_finddevice("/aliases")) != -1) 66 OF_getprop(aliases, dev, alias, sizeof(alias)); 67 len = strlen(alias); 68 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 69 alias[len - 1] > 'b') 70 return (0); 71 return (alias[len - 1] - 'a' + 1); 72 } 73 74 int 75 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 76 { 77 78 return ((b1->bsh == b2->bsh) ? 1 : 0); 79 } 80 81 /* 82 * Get the address of the UART that is selected as the console, if the 83 * console is an UART of course. Note that we enforce that both stdin and 84 * stdout are selected. 85 * Note that the currently active console (i.e. /chosen/stdout and 86 * /chosen/stdin) may not be the same as the device selected in the 87 * environment (ie /options/output-device and /options/input-device) because 88 * keyboard and screen were selected but the keyboard was unplugged or the 89 * user has changed the environment. In the latter case I would assume that 90 * the user expects that FreeBSD uses the new console setting. 91 * For weirder configurations, use ofw_console(4). 92 */ 93 static phandle_t 94 uart_cpu_getdev_console(phandle_t options, char *dev, size_t devsz) 95 { 96 char buf[32]; 97 ihandle_t stdin, stdout; 98 phandle_t chosen, input; 99 100 if (OF_getprop(options, "input-device", dev, devsz) == -1) 101 return (-1); 102 if ((input = OF_finddevice(dev)) == -1) 103 return (-1); 104 if (OF_getprop(options, "output-device", buf, sizeof(buf)) == -1) 105 return (-1); 106 if (!strcmp(dev, "keyboard") && !strcmp(buf, "screen")) { 107 if ((chosen = OF_finddevice("/chosen")) == -1) 108 return (-1); 109 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) 110 return (-1); 111 if ((input = OF_instance_to_package(stdin)) == -1) 112 return (-1); 113 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) 114 return (-1); 115 if (OF_instance_to_package(stdout) != input) 116 return (-1); 117 snprintf(dev, devsz, "ttya"); 118 } else if (OF_finddevice(buf) != input) 119 return (-1); 120 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 121 return (-1); 122 if (strcmp(buf, "serial") != 0) 123 return (-1); 124 return (input); 125 } 126 127 /* 128 * Get the address of the UART that's selected as the debug port. Since 129 * there's no place for this in the OF, we use the kernel environment 130 * variable "hw.uart.dbgport". Note however that the variable is not a 131 * list of attributes. It's single device name or alias, as known by 132 * the OF. 133 */ 134 static phandle_t 135 uart_cpu_getdev_dbgport(phandle_t options, char *dev, size_t devsz) 136 { 137 char buf[32]; 138 phandle_t input; 139 140 if (!getenv_string("hw.uart.dbgport", dev, devsz)) 141 return (-1); 142 if ((input = OF_finddevice(dev)) == -1) 143 return (-1); 144 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 145 return (-1); 146 if (strcmp(buf, "serial") != 0) 147 return (-1); 148 return (input); 149 } 150 151 static phandle_t 152 uart_cpu_getdev_keyboard(phandle_t root, char *dev, size_t devsz) 153 { 154 char buf[32]; 155 phandle_t child, node; 156 157 child = OF_child(root); 158 while (child != 0 && child != -1) { 159 if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 && 160 !strcmp(buf, "serial") && 161 OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) { 162 OF_getprop(child, "name", dev, devsz); 163 return (child); 164 } 165 if ((node = uart_cpu_getdev_keyboard(child, dev, devsz)) != -1) 166 return (node); 167 child = OF_peer(child); 168 } 169 return (-1); 170 } 171 172 int 173 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 174 { 175 char buf[32], dev[32], compat[32]; 176 phandle_t input, options; 177 bus_addr_t addr; 178 int baud, bits, error, space, stop; 179 char flag, par; 180 181 if ((options = OF_finddevice("/options")) == -1) 182 return (ENXIO); 183 switch (devtype) { 184 case UART_DEV_CONSOLE: 185 input = uart_cpu_getdev_console(options, dev, sizeof(dev)); 186 break; 187 case UART_DEV_DBGPORT: 188 input = uart_cpu_getdev_dbgport(options, dev, sizeof(dev)); 189 break; 190 case UART_DEV_KEYBOARD: 191 input = uart_cpu_getdev_keyboard(OF_peer(0), dev, sizeof(dev)); 192 break; 193 default: 194 input = -1; 195 break; 196 } 197 if (input == -1) 198 return (ENXIO); 199 error = OF_decode_addr(input, &space, &addr); 200 if (error) 201 return (error); 202 203 /* Get the device class. */ 204 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 205 return (ENXIO); 206 if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1) 207 compat[0] = '\0'; 208 di->bas.regshft = 0; 209 di->bas.rclk = 0; 210 if (!strcmp(buf, "se")) { 211 di->ops = uart_sab82532_ops; 212 di->bas.chan = uart_cpu_channel(dev); 213 addr += 64 * (di->bas.chan - 1); 214 } else if (!strcmp(buf, "zs")) { 215 di->ops = uart_z8530_ops; 216 di->bas.chan = uart_cpu_channel(dev); 217 di->bas.regshft = 1; 218 addr += 4 - 4 * (di->bas.chan - 1); 219 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") || 220 !strcmp(compat, "su") || !strcmp(compat, "su16550")) { 221 di->ops = uart_ns8250_ops; 222 di->bas.chan = 0; 223 } else 224 return (ENXIO); 225 226 /* Fill in the device info. */ 227 di->bas.bst = &bst_store[devtype]; 228 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 229 230 /* Get the line settings. */ 231 if (devtype == UART_DEV_KEYBOARD) 232 di->baudrate = 1200; 233 else 234 di->baudrate = 9600; 235 di->databits = 8; 236 di->stopbits = 1; 237 di->parity = UART_PARITY_NONE; 238 snprintf(buf, sizeof(buf), "%s-mode", dev); 239 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 240 return (0); 241 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 242 != 5) 243 return (0); 244 di->baudrate = baud; 245 di->databits = bits; 246 di->stopbits = stop; 247 di->parity = (par == 'n') ? UART_PARITY_NONE : 248 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 249 return (0); 250 } 251 252 void 253 uart_cpu_identify(driver_t *driver, device_t parent) 254 { 255 #ifdef DEV_ISA 256 char buf[32]; 257 struct isa_regs reg; 258 device_t child; 259 phandle_t node; 260 ofw_isa_intr_t intr; 261 #endif 262 263 #ifdef DEV_ISA 264 if (strcmp(device_get_name(parent), "isa") == 0) { 265 if ((node = ofw_bus_get_node(device_get_parent(parent))) == 0) 266 return; 267 for (node = OF_child(node); node != 0; node = OF_peer(node)) { 268 if (OF_getprop(node, "name", buf, sizeof(buf)) == -1) 269 continue; 270 if (strcmp(buf, "serial") != 0) 271 continue; 272 if ((OF_getprop(node, "reg", ®, 273 sizeof(reg)) == -1) || 274 (OF_getprop(node, "interrupts", &intr, 275 sizeof(intr)) == -1)) 276 continue; 277 if ((child = BUS_ADD_CHILD(parent, ISA_ORDER_SENSITIVE, 278 uart_driver_name, -1)) == NULL) 279 return; 280 bus_set_resource(child, SYS_RES_IOPORT, 0, 281 ISA_REG_PHYS(®), reg.size); 282 bus_set_resource(child, SYS_RES_IRQ, 0, intr, 1); 283 } 284 } 285 #endif 286 } 287